Learned something today

[Caveman]

Originally Posted by gasman

If I recall right, the seam faces away from the motor case (oil pan). Screw it in hand tight and then place a sharpie mark at 12:00 then with your open end wrench, tighten the cap till the mark is at the 4:30 position. Wire up, and your done........................

YOU MUST USE A NEW WASHER EACH TIME.................

Superior Vantage O-360, IO-360 Series Maintenance manual p/n SVMM01, revision A, March 2006 P#4 has a table 72-00-11.5 "Crush type gasket tightening angles" that references the 135 deg. number. It also has a note that says: install crush gasket with seam toward aluminum case. Tighten thread until cap or valve body contacts gasket. Turn additional angle shown above. Lock wire in place.

[N55CU]

When I remove the oil screen I take an empty water bottle with the cap on and then cut about 3" of the bottle away from the side of the bottle near the end so that it will sit underneath the oil screen. When you loosen the oil screen bolt, the oil will then run into the bottle and will almost fill it up before it is through draining. CCCarefully remove and you have saved a mess from running down the back of the engine.
Randy "U"
RV-7

[RV7AV8R]

Here's what my screen looked like the first time I took it out of a new 250 hr Lycoming.
[IMG]http://img176.imageshack.us/my.php?image=img1879bx3.jpg]

[IowaRV9Dreamer]

John - I think the damage to your screen may have been caused by careless installation, which is very easy to do. If you're not careful, you can catch the screen on the edge of the case (way up inside) and then simply crush it with the plug. When I got my plane the screen was the same way.

If you find a dowel of the correct size, you can slowly reform the screen and maybe save yourself from buying a new part (worked for me). Then as you are putting it back in, be sure it is seated in the case correctly before putting the plug in.

I've found the gasket to be reusable, at least a few times.

Good luck,

[RV7AV8R]

Originally Posted by IowaRV9Dreamer

John - I think the damage to your screen may have been caused by careless installation, which is very easy to do. If you're not careful, you can catch the screen on the edge of the case (way up inside) and then simply crush it with the plug. When I got my plane the screen was the same way.

If you find a dowel of the correct size, you can slowly reform the screen and maybe save yourself from buying a new part (worked for me). Then as you are putting it back in, be sure it is seated in the case correctly before putting the plug in.

I've found the gasket to be reusable, at least a few times.

Good luck,

This screen was installed at the Lycoming factory, you'd think they know how to do. This was the first time I took it out. I bought a new one and replaced it very carefully as you suggested. I think it is best to finger tighten the plug slowly to assure it isn't caught and hanging up.

[GAHco]

Originally Posted by gereed75

Anyone know the part number for the oil screen itself?? - Lyc IO-360. Thanks

Feel free to download this and print it for your personal use, regardless of where you end up ordering them, this will help you size and cross reference from the old AN900 to the new ms35769 numbers.

http://www.gen-aircraft-hardware.com...df/ms35769.pdf

Best wishes.....

[PCHunt]

Well, since I started this thread, I thought I'd report what I found today during my oil change.

All good news, actually. The screen had about 1/8 to 1/4 TEAspoon of black hard particles. When the particles were rubbed between my fingers, they disintegrated into a black oily "powder", proving that it was carbon.

The filter, when cut open, was pretty clean, again with a small amount of carbon in each pleat. No significant metal. Oil sample taken, results pending.

[flyingcharl]

Originally Posted by Kyle Boatright

On my engine (0-320 D2J), the oil pick-up screen is located near the bottom on the aft side of the sump. From the outside, it looks like a safety wired bolt screwed into the back of the sump. To remove it, you clip the safety wire holding it in place, then unscrew the fitting, which is 5/8" or larger if I recall correctly. By the way, you'll want to do this AFTER draining the sump.

Once you get it fully unscrewed, the threaded portion pulls out and brings a tubular screen with it. I place the entire assembly on some white paper towels to drain, then look down into the screen through the open end to see if there is any debris. In addition, you can simply pull the screen out of the female socket that is in the threaded plug. If you find debris, it is time to play junior scientist and figure out what the debris is. I've never found anything other than a few flakes of engine crankcase sealant.

Once you clean the screen and slide the tubular screen back into the female socket, you can screw the entire assembly (don't forget to use a new copper sealing washer between the plug and sump) back into the sump, re-safety wire it, and you're ready to go other than adding oil and whatever other tasks remain from the oil change...

Thanks for this information about screen filter I personally did not know about it
Charles Mifsud
Australia

[Steve]

I heard this a long time ago .....

Some aircraft owners are so meticulous about their safety wire that the wire install job on the pan filter plug looks as if it was done at the factory. They even repainted everything.

[vic syracuse]

Last year I worked on an O-320 dash nothing. Yes, an original O-320 circa 1953. The oil screen had never been cleaned. The original paint was still on the copper crush gasket!
And yes, I found enough metal in the filter and screen to warrant a teardown.

Vic